Hello again, xnormajeanx
For whatever its worth, my opinion is that you are likely to have broader career options with a Berkeley or Chicago degree. If you are quite certain that you want to do IR and work for Foreign Affairs Canada, Georgetown may indeed be your best option (I do not know, because I know little about the IR world). On the other hand, if you think there is a good chance you might wish to do something else (say, domestic policy) I would argue in favour of Berkeley /Chicago. The reason for this is fairly simple: Berkeley and Chicago are two of the truly great universities of the world, and are recognized as such throughout the world. Georgetown is a fine university, but not of the Berkeley/Chicago calibre (very few schools are). Chicago is deeply respected by everyone with whom I have ever discussed the matter. I know that this is a factor of some importance as I weigh my own decision; whether it will be decisive or not, time will tell.
Perhaps you wouldn't mind sharing your views on my dilemna? I'm looking at offers from Chicago, Michigan and Carnegie Mellon (the last is for their 1-year accelarated program). Funding is slightly better at Chicago than Michigan, while the CMU offer is good but not strictly comparable since it is only a 1-year program and thus cheaper in terms of opportunity cost. I will admit to being a bit intimidated by the thought of living on the south side of Chicago, and Harris sounds a little impersonal, although it looks very strong and rigorous academically. Michigan sounds solid, balanced and pleasant, while CMU has the advantage of being a very good 1-year program, but the disadvantage of less name recognition. Any thoughts?